BUICK LESABRE RADIATOR PROBLEM

1997 Buick Lesabre • 150,000 miles

My car was running fine, then I replaced my upper radiator hose. When I pulled the old one off, it was very deteriorated, so I put the new one on, I took a small cruise, then to get a burger. When I got outta the drive-thru burger joint I started home and noticed it was cutting out on acceleration a little. So I turned the car off. Then 10 minutes later I went and started it and it started shooting white smoke, what happened please?